BWGirl: Now that you mention it, they do look like defib paddles! Although I prefer the self adhesive electrodes...they're really just porcelain light sockets. I plan to use them to make a neg/slide viewer.

I'm still working on the ceiling issue. I thought of the black plastic, but there are too many hot water pipes and then there's that dryer duct...

A suspended ceiling might work. I've put it in other parts of the basement. I think if I put a good coating of paint on them, they would keep from giving off fibers...

Two cans of expanding foam already used. The stuff is really cool. You let it dry and you can cut off the excess with a knife.